Collapsed-casing roller



. 1,594,114 A. PROUT COLLAPSED CASING ROLLER Filed Nov. 28, 1924- July 27, 1926.

Mil m" Z 4 ..,@Q 17 J Jr 9 3 6 99 J 1., Q J 8 IO INVENTOR ARTHUR L PROUT ATTORNEY Patented July 27, 1926'.

ED YsrA-T as;

earner: L. 230cm; OEYGLENDALE, CALIFORNIA ssreivojero at. nsynonns,

gor tos ANeEnEs, CALIFORNIA.

' ooLLnrsEn-olisme ROLLER.

Applicationfiled November 28,1924: Seria1NEo."75 2' 7Qbj.

"It is the object of this invention-to pro vide means for' expandingcollapsed pipe,

casing, and the like, to its original cylindrical contour, the device being particularly adapted for use in mg of an oil well. More part-icularly it is the object of the connection with the easinvention to provide expanding jnea'ns adaptedto he rotated in a casing, and havmg av "tapering nose carryingrotatable' pein Contact means arranged in universal heariilgs, so that said contact means may. rotate an-whatever direction pressure is exerted by the tool a ainst the collapsedcasing'walls or reshaping and expanding the same.

It 'is-a; further objectotthe invention to providefa toolhaving a noseffor initiaHy dricalcontou'i. v a

It is a still further object "of the inven-f tion to provide a shoulder at the rear "of expanding the collapsedjwalls, and-also hav- 3 ing a cylindricalfbody in rear of said nose w th anti-frlctlona'l contact means mounted thereon so as to reshape the ex panded casing walls to their original cylinthe tool, taperingin the opposite direction tot-hat ofthe nose ofthe device, and provided with eontactmeans adapted "to expand the casing as the tool is withdrawn therethrough; in the'event of partial collapse of the walls in. rear or the too]. after insertion thereof in the casing.

, It is a still further object of the inv'ention to provide extremely simple but positive means ifor mounting the contact means on the tool, the arrangement of the parts peri mittin g' of the ready removal and replace- 'lfngilit of the contact members mounted: on

the cylindrical body' of the tool.' 7 c It .is' a,, still jfurther'objectof the inven 'tion to provide roller"con'tactfmembers on the cylindrical body of 'the tool; said rollers bearing against the body of the tool and be ing held in place by pins having-saidrollers loosely journaled thereon.

"' It'i -a S il man v v use se invention to p evide means for supplying "lubriea i'it t 15 bi "P n i ,c v I 'eel e lep d well casing.-

Theinvention will be readily understood from the iollowing description of the c'o'n'l panyi-ng drawings, in which 1 is 'a front; elevation partly in axial section F'gs. 2 and 3 are transvers the 'lines'22 and33 of Fig. 1.

Fig. 4 detail vertical; section show of the sections on ing: the method ofmounting the "contact hallsin tlie'to'ol.

fThe tool comprises a shank 1 having an I undercut shoulder 2-where'hy it may be engaged by fishing tool in the event'of ma vided with "a coupling pin 3 end so that thetool may be suspended from a usual string of rotatable drill pipe which is'ada-p'ted to be, lowered into the collapsed v At theflower end-of shank 1 the tool flares to an enlarged diameter so as' to form an annular tapering surface 4, said surface be ing operative during withdrawal of the tool dental" displacement the {shank beingflpro- I at its 1 upper from the-casing, to expand any restriction formed in the casing Wallin rear of the tool after its insertioninthewell. v i

Below the tapering surfacej the body of the tool 'islcylindrica'l; and forms annular "shoulders. and 6 at the respective ends of an elongated medial portion which is of re-'.

duceddiameter so as conform an annular recess 7. v

1A 'no'se for the tool dependsfrom the 0y lindrical bodyportion, said nose comprising a conical member 8 having its base ahuttingx against the lower end of the cylindrical body; and detachably fixedthereto by a'pin 9 pr-oiecti'ng axially I from; said body and threaded into a cooperating recess 10 in the f-haseo'fgthe nose piece." I I Rota tablecontact member-ears mounted onthe nose Sand are adapted to'rotate Ii-n any plane depending upon the direction in which: pressure exerted-by the tapering nose against the collapsed easing walls Fan instance of this, arrangement the 'contact m e re :shwn sea -1s "pr j ctin slightly fbeyond 'i-peripheizal t -1 9. ;andi b'a said balls may rotate in any direction, the edges of said recesses being peined over the surfaces of the balls to a slight extent, as shown at 13 in Fig. 4, in order to hold said balls in place.

Contact members are also mounted on the cylindrical body of the tool for rotation upon axes parallel to the axis of the tool, said contact members comprising elongated rollers 1 f journaled in the annular recess 7, with their outer sides projecting sligl'itly beyond the body of the tool. The rollers 14 preferably taper to a slightly reduced diameter toward their forward ends, and bear against the base of annular recess 'Z-which is correspondingly tapered so as to form a bearing surface throughout its length.

The rollers are held against radial displacement by pins 15 extending through axial bores 16 of said rollers the ends of said pins being received in bearing apertures 17 which extend through shoulders 5 and 6. The bearing apertures extend all the way through said shoulders. and the upper ends of the apertures in shoulder 5 at the rear end of the tool, are of reduced diameter so as to form end abutments 18 for preventing axial displacement of pins 15 in one direction. The pins are held against axial displacement in the opposite direction by abutment of nose 8 against the shoulder 6, a construction which permits of ready removal and replacement of the pins and rollers by disconnecting the nose 8 from the body portion of the tool, so that pins 15 may be witl'idrawn through the apertures 17 in the shoulder (3, ,Vhen the pins are to be thus withdrawn. they may be readily dislodged by a suitable tool inserted in the open end'sof the apertures 1? which extend through shoulder Washers 19 are preferably mounted on pins 15- between the ends of the rollers and the adjacent surfaces of shoulders 5 and 6, and the rollers are loosely mounted on pins 1.5 so as to bear directly against the base of recess 7. By this construction the rollers are free to rotate and pins 15 are relieved of any strain.

Contact members rotatable in any plane are also mounted on the tapering surface l of the tool. said members comprising balls 11 projecting slightly beyond surface 4: and journaled in corresponding bearing recesses 12 as explained in connection with balls 11 and 11 By the construction as thus described it will be seen that when the tool is rotated and gradually forced downwardly between the collapsed walls of a casing, the balls 11 and 11 will engage the restricted portion of the casing, and due to the taper of nose 8, will gradually expand said Walls; and the rollers '14 will then'engage the expanded walls, and by; continued -rotation of the tool as it is forced downwardly, the rollers will reshape the walls of the casing to their original cylindrical contour. When the tool is subse quently withdrawn, the balls 11 of tapering surface 4 will engage any restriction which may form in the casing above the tool, so as to expand said casing and thus permit the free removal of the tool.

The ends of rollers 14 are preferably curved as shown at 20 so as to provide agradual transition from the contact surface of either nose 8 or taper 4 to the contact surface of rollers 14, in order to prevent end abutment of said rollers against any restriction formed by the collapsed casing walls. The tool will thus be continuous in its operation and will be free of any tendency to stick or bind as it is withdrawn or inserted.

In order to lubricate the surface of the collapsed casing which is engaged by the contact means of theexpanding member, an axial bore 21 extends through shank 1 so as to communicate with the bore of the drillpipe upon which the tool is mounted, and a suitable lubricant is forced downwardly through the drill pipe and into bore 21. The bore 21 is adapted for discharge of the lubricant adjacent the contact means of the tool, and as an'instance of this arrangement bore 21. terminates above the annular recess 7, and branch bores 22 extend therefrom and open through the tool at the upper end of recess 7 opposite the respective rollers 1 1. The lubricant may thus be discharged from the tool throughout operation thereof.

The tool may be made in various sizes for use in connection with casing of different diameters, and the tools of each size are adapted for small. variation in the diameter of the circle described by the contact surfaces of rollers 14-, in order to adapt the tool to differences in internal diameter of casings of the same size, as is caused by the use of easing material of different thicknesses.

For this purpose bearing apertures 17 are formed through shoulders 5 and 6 of the tool, in radially spaced relation beyond apertures 17 and in circumferentially spaced relation between said apertures. The rollers 14 may thus be replaced by rollers 14 of slightly greater diameter as shown in dotted lines in Fig. 3, the pins 15 on which said larger rollers are mounted being received in the apertures 17*, so that said rollers will bear against the base of annular recess 7 and will form a contact surface of slightly increased diameter.

I claim c 1. A device of the character described comprising a body portion and a tapering nose at one end thereof, the opposite end ofsaid body forming a surface tapering in the opposite direction, and rotatable contact means .on said tapering surface.-

, 2. A device of the charactclg described comprising a member having a bearing recess extending longitudinally thereof at its periphery, a roller in said recessbearmg against thebase of'the same, and a pin.

having said roller looselyvjournaled there on with the ends of the pin projecting beyond the respective ends oftheroller and extending into said member.

3. A device of the characterdescribed comprising a member havinga medial portion of lts length of reduced diameter to form an annular peripheral recess, rollers in said recess projecting beyond the periplr' ery of said member and bearing aga nst,

the base of said recess, and pins having said rollersloosely' journaled thereon and extending said recess.

4. A device of the character described comprisin-gja body portion and a detachable nose, rollers journaled on said body, supfporting pins for 831d rollers, and bearing,

apertures in said body adapted to receive said pins, 'said apertures opening through the end of said body adjacent said nose wherebyysaid pins are removably held in said apertures by the abutmentotsaid nose against the end of said body.

5. A device of the character described comprising an, expanding member, rollers: having pins projectlng' axially from both en'ds'thereof and mounted in. said member, and means for radially ad usting the mount mg of said pins at both ends otthe roller.

sets radially spaced one beyond 'another, pins adapted to be received in the apertures of either set, and rollers in said medial recess on said pins.

7. A device of the character described. comprising an expanding member having means for connecting the same to a hollow support, and rotatable contact members on 1 into said member at the ends of solved in the vset.

. 11. A. deviceof [the character described comprising an expanding member havingtheperipheryof said member, said eirpand' ing'member having abore opening through the end thereof into said hollow" support and members. a

8. A device of the character described bore opening .therethrough at" the rotatable Contact member.

. conununicating with the; rotatable contact comprising an expanding-member, and a rov tatable contact member at the periphery thereof, saidiexpanding member having a 9. A device of the character described. f

comprising a body portion and a detachable nosc,contact means 'ournaled on said body,

and means for retaining the'contact meansv on the body extending into the end of the body adjacent said nose whereby said retaining means are removably held by the abutment vof thenose against the end of the body. 1

10. A" device of the character described comprising a member having a peripheral recess, bearing apertures in said member at the endsiot' said recess and arranged insets spaced radially one beyond another, contact means in said recess, andretainingme'ans" for said contact means 'adaptedzto be-re bearing apertures of either means for connecting the same to ahollow support, and rotatable contact means on the periphery ofsaid member, said expanding member having ,a bore communicating, through one end With said hollow support and open atyits'opposite end through said expanding member.

1.2. A device of" the character described comprising a member having a peripheral recess, contactmeans in said recess, and a pin having said contact means jo'urnaled beyond the respective ended the contact means and extending into said member.

lnttestimony whereof I have affi signature to this specification.

ARTHUR L. PR UT] j thereon with, the ends of the pin projecting Xed :my a 

